Propeller-wheel.



:A. E. SB'LTZBR.

PROPER-EB WHEEL.

urucuxon mum AUG.18,- 1909.

QW fimmzsez ze Patented Apr. '19, 1910.

a m nivan STATES PATENT oFrIcE;

' ABRAM E. SELTZER,

or MIAMI, FLORIDA.

PRorEtLnEwHEEn To all whom it may concern;

Be it known that I, ABRAM E. SELTZER, a

citizen of the United States of Americarre siding at Miami, in thecounty of Dade and State of Florida, have invented certain new anduseful Improvements in Propeller- VVheels, of which the following is aspecification, reference being had therein to the accompanying drawing.

This invention relates to pro ellers for boats and the principal object0 the same is to provide novel types of blades for the propeller bymeans of which the pressure is exerted to push and pull the water awayfrom the boats hull so that none of the water will be driven against thehull with the 'usual speed retarding effect.

In carrying out the object of the invention generally stated above, itis contemplated employing blades which have a twisted shank connect-ionwith the hub of the propeller, the body of each blade being flat andpresenting an outer edge which is arranged in the arc of a circle and ona compound curve so that oppositely projecting ends are provided, theends of'each blade slightly over lapping the ends of adjacent blades andarrangedvin difi'erent planes to permit the water to be-forcedrearwardly and through the openings between the overlapped ends of theblades. r

In the practical application of the invention, it-wlll, of course, bereadily understood I that changes in detail and structural arpre Figure14 is a front elevation of the improved propeller. Fig.8 is 'an edgeview thereof.- Fig. 3 is a central sectional view taken on the line 3'3,F

' l 1'. Referring to said drawings by numerals,

' 1 designates the hub-of the improved pro-- gelle'r from which theshanks 2 radiate. a1d fshanksare slightly twisted and merge into theflat bodies 3 of the blades. The blades are shown. as. three in number,although -obviously more or less may beem- Specification of LettersPatent.

rangements may be resorted to, but one erred and simple embodimentthereof is shown in the accompanying drawings,

where1n ployed, and each blade. is a segment of a circle. Theperipheryof each blade isin the form of a compound curve as indicated at4=to provide a forwardly-projecting end portion 6, the end edges ofwhich are straight, as indicated at. 7. The longitudinal edges 8oftheshanks 2 merge into said between each pair of shanks.

as said ends are projected on curves In an propeller. It will thus beseen that the tained while moving either forward or backward; and. thatthe centrifugal pressure of duced.

What I claim is my invention is posed at right angles to the axis of thehub,

compound cu'rve, said blades being ,a' segment of a circle and providedwith a for- ,wardlfy and rearwardly projecting end, and arran ed so thattherearwardly projecting end of the forwardly projecting end of the'adja tween ovoidal openings which are arranged each opening beingproximate the hub.

signature in presence of two witnesses.

, -ABRAM E. SELTZERP I Witnesses: a 1 ORLo EDWARD HAINLIN,

- WILLIAM FRANKLIN MILLER.

portion 5 and a rearwardly-projecting end bearing surfaces of the bladesare increased; that a similar force of propulsion is obthe water aroundthe hub is considerably remedially of 'the hub, the larger portion of,

. Patented Apr. 19, 1910.

' F v Application filed August 16, 1909. Serial No. 513,091. v,

.A propeller comprising a hub, shanks radiating therefrom, said shanksbeing disa blade carried by each shank having a flatbody with itsmarginal edge presenting a one blade overlaps in spaced relatibn I centblade, and the shanks having therebe- In testimony whereof I hereuntoaflix my

